[deliverable/linux.git] / include / asm-sparc64 / parport.h

/* $Id: parport.h,v 1.11 2001/05/11 07:54:24 davem Exp $
 * parport.h: sparc64 specific parport initialization and dma.
 *
 * Copyright (C) 1999  Eddie C. Dost  (ecd@skynet.be)
 */

#ifndef _ASM_SPARC64_PARPORT_H
#define _ASM_SPARC64_PARPORT_H 1

#include <asm/ebus.h>
#include <asm/isa.h>
#include <asm/ns87303.h>

#define PARPORT_PC_MAX_PORTS	PARPORT_MAX

/*
 * While sparc64 doesn't have an ISA DMA API, we provide something that looks
 * close enough to make parport_pc happy
 */
#define HAS_DMA

static struct sparc_ebus_info {
	struct ebus_dma_info info;
	unsigned int addr;
	unsigned int count;
} sparc_ebus_dmas[PARPORT_PC_MAX_PORTS];

static __inline__ void enable_dma(unsigned int dmanr)
{
	ebus_dma_enable(&sparc_ebus_dmas[dmanr].info, 1);

	if (ebus_dma_request(&sparc_ebus_dmas[dmanr].info,
			     sparc_ebus_dmas[dmanr].addr,
			     sparc_ebus_dmas[dmanr].count))
		BUG();
}

static __inline__ void disable_dma(unsigned int dmanr)
{
	ebus_dma_enable(&sparc_ebus_dmas[dmanr].info, 0);
}

static __inline__ void clear_dma_ff(unsigned int dmanr)
{
	/* nothing */
}

static __inline__ void set_dma_mode(unsigned int dmanr, char mode)
{
	ebus_dma_prepare(&sparc_ebus_dmas[dmanr].info, (mode != DMA_MODE_WRITE));
}

static __inline__ void set_dma_addr(unsigned int dmanr, unsigned int addr)
{
	sparc_ebus_dmas[dmanr].addr = addr;
}

static __inline__ void set_dma_count(unsigned int dmanr, unsigned int count)
{
	sparc_ebus_dmas[dmanr].count = count;
}

static __inline__ unsigned int get_dma_residue(unsigned int dmanr)
{
	return ebus_dma_residue(&sparc_ebus_dmas[dmanr].info);
}

static int ebus_ecpp_p(struct linux_ebus_device *edev)
{
	if (!strcmp(edev->prom_name, "ecpp"))
		return 1;
	if (!strcmp(edev->prom_name, "parallel")) {
		char compat[19];
		prom_getstring(edev->prom_node,
			       "compatible",
			       compat, sizeof(compat));
		compat[18] = '\0';
		if (!strcmp(compat, "ecpp"))
			return 1;
		if (!strcmp(compat, "ns87317-ecpp") &&
		    !strcmp(compat + 13, "ecpp"))
			return 1;
	}
	return 0;
}

static int parport_isa_probe(int count)
{
	struct sparc_isa_bridge *isa_br;
	struct sparc_isa_device *isa_dev;

	for_each_isa(isa_br) {
		for_each_isadev(isa_dev, isa_br) {
			struct sparc_isa_device *child;
			unsigned long base;

			if (strcmp(isa_dev->prom_name, "dma"))
				continue;

			child = isa_dev->child;
			while (child) {
				if (!strcmp(child->prom_name, "parallel"))
					break;
				child = child->next;
			}
			if (!child)
				continue;

			base = child->resource.start;

			/* No DMA, see commentary in
			 * asm-sparc64/floppy.h:isa_floppy_init()
			 */
			if (parport_pc_probe_port(base, base + 0x400,
						  child->irq, PARPORT_DMA_NOFIFO,
						  child->bus->self))
				count++;
		}
	}

	return count;
}

static int parport_pc_find_nonpci_ports (int autoirq, int autodma)
{
	struct linux_ebus *ebus;
	struct linux_ebus_device *edev;
	int count = 0;

	for_each_ebus(ebus) {
		for_each_ebusdev(edev, ebus) {
			if (ebus_ecpp_p(edev)) {
				unsigned long base = edev->resource[0].start;
				unsigned long config = edev->resource[1].start;
				unsigned long d_base = edev->resource[2].start;
				unsigned long d_len;

				spin_lock_init(&sparc_ebus_dmas[count].info.lock);
				d_len = (edev->resource[2].end -
					 d_base) + 1;
				sparc_ebus_dmas[count].info.regs =
					ioremap(d_base, d_len);
				if (!sparc_ebus_dmas[count].info.regs)
					continue;
				sparc_ebus_dmas[count].info.flags = 0;
				sparc_ebus_dmas[count].info.callback = NULL;
				sparc_ebus_dmas[count].info.client_cookie = NULL;
				sparc_ebus_dmas[count].info.irq = 0xdeadbeef;
				strcpy(sparc_ebus_dmas[count].info.name, "parport");
				if (ebus_dma_register(&sparc_ebus_dmas[count].info))
					continue;
				ebus_dma_irq_enable(&sparc_ebus_dmas[count].info, 1);

				/* Configure IRQ to Push Pull, Level Low */
				/* Enable ECP, set bit 2 of the CTR first */
				outb(0x04, base + 0x02);
				ns87303_modify(config, PCR,
					       PCR_EPP_ENABLE |
					       PCR_IRQ_ODRAIN,
					       PCR_ECP_ENABLE |
					       PCR_ECP_CLK_ENA |
					       PCR_IRQ_POLAR);

				/* CTR bit 5 controls direction of port */
				ns87303_modify(config, PTR,
					       0, PTR_LPT_REG_DIR);

				if (parport_pc_probe_port(base, base + 0x400,
							  edev->irqs[0],
							  count, ebus->self))
					count++;
			}
		}
	}

	count = parport_isa_probe(count);

	return count;
}

#endif /* !(_ASM_SPARC64_PARPORT_H */
Commit	Line	Data
1da177e4 LT	1	/* $Id: parport.h,v 1.11 2001/05/11 07:54:24 davem Exp $
	2	* parport.h: sparc64 specific parport initialization and dma.
	3	*
	4	* Copyright (C) 1999 Eddie C. Dost (ecd@skynet.be)
	5	*/
	6
	7	#ifndef _ASM_SPARC64_PARPORT_H
	8	#define _ASM_SPARC64_PARPORT_H 1
	9
	10	#include <asm/ebus.h>
	11	#include <asm/isa.h>
	12	#include <asm/ns87303.h>
	13
	14	#define PARPORT_PC_MAX_PORTS PARPORT_MAX
	15
7fbacd52 AV	16	/*
	17	* While sparc64 doesn't have an ISA DMA API, we provide something that looks
	18	* close enough to make parport_pc happy
	19	*/
	20	#define HAS_DMA
	21
1da177e4 LT	22	static struct sparc_ebus_info {
	23	struct ebus_dma_info info;
	24	unsigned int addr;
	25	unsigned int count;
	26	} sparc_ebus_dmas[PARPORT_PC_MAX_PORTS];
	27
	28	static __inline__ void enable_dma(unsigned int dmanr)
	29	{
e3e01d60 ED	30	ebus_dma_enable(&sparc_ebus_dmas[dmanr].info, 1);
e3e01d60 ED	31
1da177e4 LT	32	if (ebus_dma_request(&sparc_ebus_dmas[dmanr].info,
	33	sparc_ebus_dmas[dmanr].addr,
	34	sparc_ebus_dmas[dmanr].count))
	35	BUG();
1da177e4 LT	36	}
	37
	38	static __inline__ void disable_dma(unsigned int dmanr)
	39	{
	40	ebus_dma_enable(&sparc_ebus_dmas[dmanr].info, 0);
	41	}
	42
	43	static __inline__ void clear_dma_ff(unsigned int dmanr)
	44	{
	45	/* nothing */
	46	}
	47
	48	static __inline__ void set_dma_mode(unsigned int dmanr, char mode)
	49	{
	50	ebus_dma_prepare(&sparc_ebus_dmas[dmanr].info, (mode != DMA_MODE_WRITE));
	51	}
	52
	53	static __inline__ void set_dma_addr(unsigned int dmanr, unsigned int addr)
	54	{
	55	sparc_ebus_dmas[dmanr].addr = addr;
	56	}
	57
	58	static __inline__ void set_dma_count(unsigned int dmanr, unsigned int count)
	59	{
	60	sparc_ebus_dmas[dmanr].count = count;
	61	}
	62
	63	static __inline__ unsigned int get_dma_residue(unsigned int dmanr)
	64	{
	65	return ebus_dma_residue(&sparc_ebus_dmas[dmanr].info);
	66	}
	67
	68	static int ebus_ecpp_p(struct linux_ebus_device *edev)
	69	{
	70	if (!strcmp(edev->prom_name, "ecpp"))
	71	return 1;
	72	if (!strcmp(edev->prom_name, "parallel")) {
	73	char compat[19];
	74	prom_getstring(edev->prom_node,
	75	"compatible",
	76	compat, sizeof(compat));
	77	compat[18] = '\0';
	78	if (!strcmp(compat, "ecpp"))
	79	return 1;
	80	if (!strcmp(compat, "ns87317-ecpp") &&
	81	!strcmp(compat + 13, "ecpp"))
	82	return 1;
	83	}
	84	return 0;
	85	}
	86
	87	static int parport_isa_probe(int count)
	88	{
	89	struct sparc_isa_bridge *isa_br;
	90	struct sparc_isa_device *isa_dev;
	91
	92	for_each_isa(isa_br) {
	93	for_each_isadev(isa_dev, isa_br) {
	94	struct sparc_isa_device *child;
	95	unsigned long base;
	96
	97	if (strcmp(isa_dev->prom_name, "dma"))
	98	continue;
	99
100	child = isa_dev->child;
101	while (child) {
102	if (!strcmp(child->prom_name, "parallel"))
103	break;
104	child = child->next;
105	}
106	if (!child)
107	continue;
108
109	base = child->resource.start;
110
111	/* No DMA, see commentary in
112	* asm-sparc64/floppy.h:isa_floppy_init()
113	*/
114	if (parport_pc_probe_port(base, base + 0x400,
115	child->irq, PARPORT_DMA_NOFIFO,
116	child->bus->self))
117	count++;
118	}
119	}
120
121	return count;
122	}
123
124	static int parport_pc_find_nonpci_ports (int autoirq, int autodma)
125	{
126	struct linux_ebus *ebus;
127	struct linux_ebus_device *edev;
128	int count = 0;
129
130	for_each_ebus(ebus) {
131	for_each_ebusdev(edev, ebus) {
132	if (ebus_ecpp_p(edev)) {
133	unsigned long base = edev->resource[0].start;
134	unsigned long config = edev->resource[1].start;
135	unsigned long d_base = edev->resource[2].start;
136	unsigned long d_len;
137
138	spin_lock_init(&sparc_ebus_dmas[count].info.lock);
139	d_len = (edev->resource[2].end -
140	d_base) + 1;
141	sparc_ebus_dmas[count].info.regs =
142	ioremap(d_base, d_len);
143	if (!sparc_ebus_dmas[count].info.regs)
144	continue;
145	sparc_ebus_dmas[count].info.flags = 0;
146	sparc_ebus_dmas[count].info.callback = NULL;
147	sparc_ebus_dmas[count].info.client_cookie = NULL;
148	sparc_ebus_dmas[count].info.irq = 0xdeadbeef;
149	strcpy(sparc_ebus_dmas[count].info.name, "parport");
150	if (ebus_dma_register(&sparc_ebus_dmas[count].info))
151	continue;
152	ebus_dma_irq_enable(&sparc_ebus_dmas[count].info, 1);
153
154	/* Configure IRQ to Push Pull, Level Low */
155	/* Enable ECP, set bit 2 of the CTR first */
156	outb(0x04, base + 0x02);
157	ns87303_modify(config, PCR,
158	PCR_EPP_ENABLE \|
159	PCR_IRQ_ODRAIN,
160	PCR_ECP_ENABLE \|
161	PCR_ECP_CLK_ENA \|
162	PCR_IRQ_POLAR);
163
164	/* CTR bit 5 controls direction of port */
165	ns87303_modify(config, PTR,
166	0, PTR_LPT_REG_DIR);
167
168	if (parport_pc_probe_port(base, base + 0x400,
169	edev->irqs[0],
170	count, ebus->self))
171	count++;
172	}
173	}
174	}
175
176	count = parport_isa_probe(count);
177
178	return count;
179	}
180
181	#endif /* !(_ASM_SPARC64_PARPORT_H */